*{margin: 0;padding: 0;}
html,body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,dl,dt,dd,form,input,select,img,
textarea{margin: 0;padding: 0;}
a,u,ins{
	text-decoration: none;
} /* 注意:最后一个选择器的逗号要去掉,不然不生效,操作过程中出现的错误 */
li{list-style: none;}
b,strong,h1,h2,h3,h4,h5,h6{font-weight: normal;}
em,i{font-style: normal;}
img{ vertical-align: middle;}
.r{float: right;}
.l{float: left;}
.clear:after{
	content: "";
	display: block;
	clear: both;
	overflow: hidden;
	height: 0;
	visibility: hidden;	
}
